[특허]HVAC actuator with automatic end stop recalibration

[미국특허] HVAC actuator with automatic end stop recalibration 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-007/00 H02P-029/00 H02P-027/08 H02P-029/02 H02P-029/024 H02H-007/08 H02H-007/085 H02P-006/08 H02P-006/24 H02P-006/17 H02P-029/60 H02P-029/40 F24F-013/14
출원번호	US-0983229 (2015-12-29)
등록번호	US-9641122 (2017-05-02)
발명자 / 주소	Romanowich, Gary A. Alexander, Robert K.
출원인 / 주소	Johnson Controls Technology Company
대리인 / 주소	Foley & Lardner LLP
인용정보	피인용 횟수 : 2 인용 특허 : 34

초록 ▼

An actuator in a HVAC system includes a motor and a drive device driven by the motor. The drive device is coupled to a movable HVAC component for driving the movable HVAC component between multiple positions. The actuator further includes a main actuator controller. The main actuator controller includes end stop location memory that stores one or more end stop locations indicating expected locations of the one or more end stops. The main actuator controller further includes an end stop location recalibrator that runs an automatic recalibration process to determine and set recalibrated end stop locations. The end stop location recalibrator runs the automatic calibration process in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location.

대표청구항 ▼

1. An actuator in a HVAC system, the actuator comprising: a motor;a drive device driven by the motor and coupled to a movable HVAC component for driving the movable HVAC component between multiple positions bounded by one or more end stops; anda main actuator controller comprising: end stop location memory that stores one or more end stop locations indicating expected locations of the one or more end stops; andan end stop location recalibrator that runs an automatic recalibration process to determine and set recalibrated end stop locations in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location. 2. The actuator of claim 1, wherein the drive device unexpectedly stalls prior to reaching a stored end stop location. 3. The actuator of claim 1, wherein the drive device proceeds through a stored end stop location and unexpectedly stalls at a location beyond the stored end stop location. 4. The actuator of claim 1, wherein the main actuator controller further comprises a stall detector that detects when the drive device has stalled and records the location of the drive device at stall. 5. The actuator of claim 4, wherein the main actuator controller further comprises a comparator that compares the stored end stop locations to the location of the drive device at stall and automatically initiates an automatic recalibration process in response to a determination that the location of the drive device at stall does not match any of the stored end stop locations. 6. The actuator of claim 1, wherein the main actuator controller further comprises a stroke respanner that calculates an adjusted stroke length of the actuator based on the recalibrated end stop locations. 7. The actuator of claim 6, wherein the main actuator controller further comprises a setpoint adjuster that receives an actuator position setpoint and adjusts the actuator position setpoint based on the adjusted stroke length. 8. The actuator of claim 1, further comprising one or more position sensors that measure a position of at least one of the drive device, the motor, and the movable HVAC component; wherein the main actuator controller determines that the drive device is approaching an stored end stop location using feedback from the position sensors. 9. The actuator of claim 8, further comprising a threshold calculator that receives the stored end stop location from the end stop location memory and generates a soft stall threshold using the expected end stop location. 10. The actuator of claim 9, further comprising a comparator that compares the measured position with the soft stall threshold and generates a soft stall signal indicating the drive device is approaching the stored end stop location in response to the measured position reaching the soft stall threshold. 11. A method for controlling a HVAC actuator that includes a motor and a drive device driven by the motor and coupled to a movable HVAC component, the method comprising: operating the motor to drive the movable HVAC component between multiple positions bounded by one or more end stops;retrieving stored end stop locations from end stop location memory; andautomatically initiating an automatic calibration procedure to determine and set recalibrated end stop locations in response to detecting that the drive device has unexpectedly stalled at a location other than a stored end stop location. 12. The method of claim 11, further comprising detecting when the drive device unexpectedly stalls prior to reaching a stored end stop location. 13. The method of claim 11, further comprising detecting when the drive device proceeds through a stored end stop location and unexpectedly stalls at a location beyond the stored end stop location. 14. The method of claim 11, further comprising: detecting that the drive device has encountered an unexpected end stop by determining when the drive device has stalled; andrecording the location of the drive device at stall. 15. The method of claim 14, further comprising comparing the stored end stop locations to the location of the drive device at stall and automatically initiating an automatic recalibration process in response to a determination that the locations do not match. 16. The method of claim 11, further comprising recalculating an adjusted stroke length of the actuator based on the recalibrated end stop locations. 17. The method of claim 16, further comprising receiving an actuator position setpoint and adjusting the actuator position setpoint input based on the adjusted stroke length. 18. The method of claim 11, further comprising using one or more position sensors to measure a position of at least one of the drive device, the motor, and the movable HVAC component; wherein determining that the drive device is approaching the stored end stop location comprises using feedback from the position sensors. 19. The method of claim 18, further comprising using the location of the stored end stop to generate a soft stall threshold. 20. The method of claim 19, further comprising: comparing the measured position with the soft stall threshold; andgenerating a soft stall signal indicating that the drive device is approaching the stored end stop location in response to the measured position reaching the soft stall threshold.

이 특허에 인용된 특허 (34) 인용/피인용 타임라인 분석

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Van Berkum Robert A. (117 Fernwood Rd. Chagrin Falls OH 44022), Control system for combustion apparatus.
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Erdman David M. (Fort Wayne IN), Control system, electronically commutated motor system, blower apparatus and methods.
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McMillan,Scott D.; Mrozek,Greg T., Current control loop for actuator and method.
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Itoh Hiromu (Nara JPX) Tani Zempei (Tondabayashi JPX) Hachimura Kenji (Nara JPX), Digitalized position control for a D.C. motor.
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Kushida, Hiroyuki; Takanose, Tsuyoshi, Drive control circuit for three-phase brushless motor, motor-driven blower and electric vacuum cleaner.
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Hou, Li-Cong; Dai, Hong-Hai, Edge detection apparatus and computing circuit employed in edge detection apparatus.
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Braun, Jost, Gas-turbine power plant.
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Frankel, Scott; Martin, Peter; Hardt, Eric, Intelligent cooling fan.
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Hayashida Takahiro,JPX, Inverter control method and apparatus.
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David B. Gustavson ; David V. James ; Hans A. Wiggers ; Peter B. Gillingham CA; Cormac M. O'Connell CA; Bruce Millar CA; Jean Crepeau CA; Kevin J. Ryan ; Terry R. Lee ; Brent Keeth ; Troy A, Memory system having synchronous-link DRAM (SLDRAM) devices and controller.
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Post Stephen F. (Pleasant Hill CA) Mele David (Fremont CA), Method and apparatus for DC motor speed control.
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Beifus Brian L. (Fort Wayne IN), Method and apparatus for controlling a blower motor in an air handling system to provide constant pressure.
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Kuster, Beat; Bearth, Roy, Method and devices for driving a damper.
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Bauer Michael Bradley ; Davis ; Jr. Leighton Ira, Method and system for controlling an automotive HVAC system based on the principle of HVAC work.
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Hsu, Chia-Chang; Yang, Chih-Shih, Method for driving a brushless DC motor.
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Strauss Jason ; Ginzburg Michael ; Kopel Zev,CAX ; Shao Shu Yong, Microprocessor-based controller for actuator motors with capacitive power backup and method therefor.
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Yabusaki, Hitoshi; Milesi, Alejandro G.; Milano, Shaun D.; Kozomora, Nevenka; Doogue, Michael C., Motor controller.
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De Frutos,Xavier; Mourrier,Andr챕; Lee,Chikyam, Motor drive.
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Gary A. Romanowich ; Lawrence J. Strojny ; Gerald A. Duenkel, Motorized actuator with a variable stall level.
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Horie,Munehiro, Refrigerant leak detector compressor.
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Jones,Gordon; Int hout,Dan, System and method for controlling heating and ventilating systems.
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Young Glen C., System and method for detection and control of circulating currents in a motor.
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MacKay,David Kyle, System and method for sensor less magnetic field control of a motor.
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Diamond, Russell W.; Romanowich, Gary A.; Fuhr, David R., Systems and method for speed and torque control of a DC motor.
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Becerra Roger C. (Fort Wayne IN) Brattoli Mark A. (Fort Wayne IN), Systems and methods for protecting a single phase motor from circulating currents.
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Byrnes Howard P. ; Steffen Daniel B., Variable speed fan motor control for forced air heating/cooling system.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] HVAC actuator with automatic end stop recalibration 원문보기